[SOLVED] Microdia SN9C201 webcam is not working

.i dont have /dev/video0 so i cant take photos . i have laptop ( asus z53jseries).i before used ubuntu8.10 now I use ubuntu 9.04. In both of them i cant use my camera. when i use a program such as CHEESE , EKIGA softphone , camera monitor preferences it this massages that (no camera found) or( camera monitor is not running) .

Comments

1. Ask for assistance, just stating something isn't working is a very rude way to start a conversation because it sounds like you are expecting us to solve your problem with very little initiative or cooperation from you.
2. Tell us what version of Ubuntu you are using
3. Give us the device information about the non-working device (I am assuming it is a webcam) as it is displayed when you run the command lspci

While I couldn't find the Microdia part number for my webcam, I did read that most (if not all) of the recent Microdia products use the uvc driver. I don't know if that's the case with the webcam in the asus, but, to check you could try:

"lsmod | grep video" in a terminal (without quotation marks) to see if the uvcvideo driver is present.
If not, try "modprobe uvcvideo" (without quotes) then try lsmod | grep video again and see if it's there.
Maybe it's just not being loaded up at startup time.

Another way to check is to install "cheese". Cheese is the one app that seems to be working (upstream took the drivers entering the kernel into account early). If Cheese works, then the problems with the webcam might be based on the apps being used to access it (folks are still having problems with kopete, skype and pidgin). You can check the Ubuntu repos for it. Or in a terminal do "sudo apt-get install cheese" (no quotes).